According to the publication by Android Police and e-mail sent out by Slack, you should update your password if you’re using Slack on Android. The company introduced a bug in December for Android users that would have stored the password in plain text, which means it could have been exposed to others.
Read: How to download Google Play Music Library before its sunset on February 24
You can change your password via the link e-mailed to you from Slack. Prior to this, make sure that the app on your device is updated as it will bring bug fixes, password modification in the old version will not secure your credentials. Alternatively, you can change the password from the desktop as well.
Password guidelines: The new password you choose must be at least six characters long, and can’t be things like password, 123456, or abcdef. For security reasons, you can’t reuse your previous password.
Related: Best Android Apps for Chromebook